1121354b2SSong Qiang // SPDX-License-Identifier: GPL-2.0 2121354b2SSong Qiang /* 3121354b2SSong Qiang * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus. 4121354b2SSong Qiang * 5121354b2SSong Qiang * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> 6121354b2SSong Qiang * 7121354b2SSong Qiang * i2c slave address: 0x20 + SA1 << 1 + SA0. 8121354b2SSong Qiang */ 9121354b2SSong Qiang 10121354b2SSong Qiang #include <linux/i2c.h> 11121354b2SSong Qiang #include <linux/module.h> 12121354b2SSong Qiang 13121354b2SSong Qiang #include "rm3100.h" 14121354b2SSong Qiang 15121354b2SSong Qiang static const struct regmap_config rm3100_regmap_config = { 16121354b2SSong Qiang .reg_bits = 8, 17121354b2SSong Qiang .val_bits = 8, 18121354b2SSong Qiang 19121354b2SSong Qiang .rd_table = &rm3100_readable_table, 20121354b2SSong Qiang .wr_table = &rm3100_writable_table, 21121354b2SSong Qiang .volatile_table = &rm3100_volatile_table, 22121354b2SSong Qiang 23121354b2SSong Qiang .cache_type = REGCACHE_RBTREE, 24121354b2SSong Qiang }; 25121354b2SSong Qiang 26121354b2SSong Qiang static int rm3100_probe(struct i2c_client *client) 27121354b2SSong Qiang { 28121354b2SSong Qiang struct regmap *regmap; 29121354b2SSong Qiang 30121354b2SSong Qiang regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config); 31121354b2SSong Qiang if (IS_ERR(regmap)) 32121354b2SSong Qiang return PTR_ERR(regmap); 33121354b2SSong Qiang 34121354b2SSong Qiang return rm3100_common_probe(&client->dev, regmap, client->irq); 35121354b2SSong Qiang } 36121354b2SSong Qiang 37121354b2SSong Qiang static const struct of_device_id rm3100_dt_match[] = { 38121354b2SSong Qiang { .compatible = "pni,rm3100", }, 39121354b2SSong Qiang { } 40121354b2SSong Qiang }; 41121354b2SSong Qiang MODULE_DEVICE_TABLE(of, rm3100_dt_match); 42121354b2SSong Qiang 43121354b2SSong Qiang static struct i2c_driver rm3100_driver = { 44121354b2SSong Qiang .driver = { 45121354b2SSong Qiang .name = "rm3100-i2c", 46121354b2SSong Qiang .of_match_table = rm3100_dt_match, 47121354b2SSong Qiang }, 48121354b2SSong Qiang .probe_new = rm3100_probe, 49121354b2SSong Qiang }; 50121354b2SSong Qiang module_i2c_driver(rm3100_driver); 51121354b2SSong Qiang 52121354b2SSong Qiang MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>"); 53121354b2SSong Qiang MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver"); 54121354b2SSong Qiang MODULE_LICENSE("GPL v2"); 55*230ee6c6SJonathan Cameron MODULE_IMPORT_NS(IIO_RM3100); 56